Is Hakeemullah 'losing control' of Pakistani Taliban?

This report from The Express Tribune claims that Hakeemullah Mehsud, the leader of the Movement of the Taliban in Pakistan, is "isolated" and "losing control" of the terror group. The reasons given are as follows:
Fazal Saeed Utezai (also known as Fazal Saeed Haqqani), a commander in Kurram, defected from the Movement of the Taliban in Pakistan.
Shakirullah Shakir, a commander and spokesman of the Fedayeen-e-Islam, the Taliban's suicide teams, was murdered in Miramshah.
Pakistani intelligence officials said so.